reasonable standard deviation

this probably isn't the correct place to post... but i'd appreciate any help.

in a limit 5-10 game with 5 average seeing flop and 30% preflop raising (so moderate loose, low-medium aggression), what is a reasonable standard deviation per hour? i was thinking 5 big bets is too low, 10 big bets is too high, so i was going to use 7.5 big bets.

meaning 68% chance up or down 7.5 big bets ($75) in an hour, 95% chance up or down ($150) and 99% chance up or down $225 in an hour....

does that seem low or high to you guys??? just want to run some variance analysis on 2 big bet/hour win rate with a standard deviation??

thanks in advance!

turned out there was alot of stuff in sticky notes here in twoplustwo.com (not sure which forum or anything as i used google advanced search - much better than twoplustwo.com search engine)...

looks like my # may be too low based on 50 hands per hour, but too high based on B&M 25 hands per hour (optimistic)

twoplustwo.com sticked suggests 14-18 BB Std Dev/100 hands... so per 50 hands it would 10-13 BB STD DEV (i divided by sqrt of 2), and per 25 hands, it would 7-9 STD DEV..

not sure what i was thinking of.. played B&M last night. pretty slow on # hands per hour, but alot softer than online.